diff --git a/component/sniffer/dispatcher.go b/component/sniffer/dispatcher.go
index 2d78fcdf..a712c1f0 100644
--- a/component/sniffer/dispatcher.go
+++ b/component/sniffer/dispatcher.go
@@ -46,14 +46,18 @@ func (sd *SnifferDispatcher) TCPSniff(conn net.Conn, metadata *C.Metadata) {
 			return
 		}
 
+		inWhitelist := false
 		for _, portRange := range *sd.portRanges {
-			if !portRange.Contains(uint16(port)) {
-				return
-			} else {
+			if portRange.Contains(uint16(port)) {
+				inWhitelist = true
 				break
 			}
 		}
 
+		if !inWhitelist {
+			return
+		}
+
 		if host, err := sd.sniffDomain(bufConn, metadata); err != nil {
 			log.Debugln("[Sniffer] All sniffing sniff failed with from [%s:%s] to [%s:%s]", metadata.SrcIP, metadata.SrcPort, metadata.String(), metadata.DstPort)
 			return